[Highest Quality Standard] Fine polished stainless steel frame calipers with knurled rollers and locking screws to ensure smooth and precise positioning during use. Using the hardening process, no rust, more durable and longer service life [Precise measurement] The digital caliper can measure up to 6/150 mm with an accuracy of 0.01 mm. This allows you to zero at any point on the scale and start a new measurement, with just one click Immediately switch between inches/mm, one button, extra large with 4 measuring functions inside diameter, outside diameter , depth and scale Large LCD displayDigital caliper, large LCD display, readings more clearly. The reading can be displayed in inch or millimeter format. Dust and Oil [Versatility] This professional digital caliper measures inside, outside, depth and pitch using two sets of jaws and sensors; using the zero button, we can reset the value during the measurement process, which makes it more flexible to use [Premium] The digital caliper is equipped one LR44 1.5V button battery and one button cell is included. The caliper has passed CE certification. A digital meter with auto on/off function ensures your battery won't run out on arrival. Highly recommended for home and professional use